EP0986345B1 - Behälter und verfahren zur vernetzung von verbundwerkstoffen auf zahnprothesen - Google Patents

Behälter und verfahren zur vernetzung von verbundwerkstoffen auf zahnprothesen Download PDF

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Publication number
EP0986345B1
EP0986345B1 EP98928221A EP98928221A EP0986345B1 EP 0986345 B1 EP0986345 B1 EP 0986345B1 EP 98928221 A EP98928221 A EP 98928221A EP 98928221 A EP98928221 A EP 98928221A EP 0986345 B1 EP0986345 B1 EP 0986345B1
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EP
European Patent Office
Prior art keywords
plate
elements
container
wax
blocks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98928221A
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English (en)
French (fr)
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EP0986345A1 (de
Inventor
Silvia Assi
Antonio Tissi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Assi Silvia
Ribas SNC di TISSI Antonio e ASSI Silvia
Original Assignee
Assi Silvia
RIBAS SNC DI TISSI ANTONIO E
Ribas SNC di TISSI Antonio e ASSI Silvia
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Application filed by Assi Silvia, RIBAS SNC DI TISSI ANTONIO E, Ribas SNC di TISSI Antonio e ASSI Silvia filed Critical Assi Silvia
Publication of EP0986345A1 publication Critical patent/EP0986345A1/de
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Publication of EP0986345B1 publication Critical patent/EP0986345B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/12—Tools for fastening artificial teeth; Holders, clamps, or stands for artificial teeth
    • A61C13/16—Curing flasks; Holders therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/20—Methods or devices for soldering, casting, moulding or melting

Definitions

  • the present invention relates to a container and a method for cross-linking composite materials on dental crowns, bridges and arches, particularly for use with photopolymerizing lamps.
  • the invention relates to a container and to a method for modeling teeth in the field of prosthodontics.
  • a photopolymerizable composite material is applied directly to the metallic structure that constitutes the support for the teeth forming the dental prosthesis to be produced; said material is modeled manually in order to produce the correct shape and size of the individual teeth composing the prosthesis.
  • a partial solution to this problem might consist in providing the plaster pattern in two or three parts, but it has been observed that in this case it is very difficult to adjust each part of the plaster pattern with the same pressure and in the same position in order to achieve correct shaping of the composite material.
  • BE-A-513 972 discloses a muffle consisting of four elements made of steel and mutually connected by means of lateral rods for engaging in lateral guides of the muffle.
  • This kind of muffle has a metallic structure specifically aimed at treating thermosetting materials for prosthodontics purposes.
  • DE-A-40 28 728 concerns a mold consisting of a single element provided with a pouring spout for pouring therein a synthetic material in a fluid form, useful for preparing a palate for mobile prosthesis.
  • This prior art document concerns a method for preparing a palate for mobile prosthesis, rather than for making teeth.
  • the aim of the present invention is to provide a container for molding teeth which allows to model both individual teeth and very extensive bridges or entire dental arches by using the container itself as a mold.
  • an object of the present invention is to provide a container for molding teeth previously modeled in wax instead of directly using the composite material on the metallic supporting structure.
  • Another object of the present invention is to provide a container for molding teeth which can be exposed directly to photopolymerizing light.
  • Another object of the present invention is to provide a container for modeling teeth which allows to quickly correct any errors in color or characterization.
  • Another object of the present invention is to provide a container for modeling teeth which ensures a quality of the finished work which is equal to, or better than, the conventional manual method.
  • Another object of the present invention is to provide a method for molding teeth which allows to use a specifically provided modeling container which can be exposed to photopolymerizing light.
  • Another object of the present invention is to provide a tooth molding method which allows to obtain a mold of the wax model which can be tested directly in the patient's mouth so as to allow to easily correct any imprecisions thereof.
  • Another object of the present invention is to provide a container and a method for molding teeth which are highly reliable, relatively easy to provide and at low costs.
  • a container for cross-linking composite materials on dental bridges and arches and on individual teeth as defined in the appended claim 1
  • a method as defined in the appended claim 11, for cross-linking composite materials on teeth of bridges and dental arches by means of the container according to claim 1.
  • the container according to the present invention generally designated by the reference numeral 100, comprises a first plate-like element or base element 1 (see Figure 1) provided with a plurality of small holes 2 and with at least two larger holes 3 (but preferably four) which are meant to allow the passage of a pair of traction elements which are described hereinafter.
  • a second plate-like element 4 is glued to the first element 1, and an inner region thereof may be divided into a plurality of blocks 5 which can be separately removed and has at least a pair of holes (similar to the holes 3 of the first plate-like element and therefore designated by the reference numeral) which arrange themselves at the holes 3 of the first plate-like element 1.
  • the region formed by the blocks 5 has a shape which corresponds to an imaginary dental arch of a patient.
  • the blocks can be shaped in any manner which is not limited to the shape shown in Figure 2, and their dimensions may likewise be variable.
  • the blocks 5 are inserted in a central region 8 of the plate-like element 4, so that if one of the blocks is removed the remaining blocks remain in place.
  • the small holes 2 formed in the base plate-like element 1 are located at the blocks 5 so that when the first and second plate-like elements 1 and 4 are glued together it is possible to remove the blocks 5 in the chosen position simply by acting through the small holes 2 with a pointed object.
  • the number of holes 2 must be equal to, or greater than, the number of blocks 5.
  • a third plate-like element 6 is also provided which is similar to the second plate-like element 4 and is therefore also shown in Figure 2.
  • the third plate-like element 6 forms blocks 5 which are shaped like the blocks 5 of the second plate-like element 4, except that in the fixed central body the third plate-like element 6 has upper edges (adjacent to the blocks) which are chamfered, so as to form undercuts with the corresponding blocks whose functions will be defined hereinafter.
  • discharge channels 9 are provided which allow to discharge the transparent silicone used during a step of the method as described hereinafter.
  • a fourth and last plate-like element 7, shown in Figure 3, is meant to be arranged on the third plate-like element 6.
  • the third plate-like element 6 and the fourth plate-like element 7 are both provided with the same holes 3 formed in the first and second plate-like elements 1 and 4.
  • the traction elements 10 inserted in the holes 3 are then clamped by means of wing nuts or plain nuts.
  • the multilayer container described above is conveniently made of plastics, such as for example polycarbonate or plexiglass or in any case of a material which can be transparent to light.
  • the third and fourth plate-like elements 6 and 7 must be made of transparent material in order to allow the passage of light for the photopolymerization step described hereinafter.
  • the first plate-like element 1 and the second plate-like element 4 need not be made of transparent and plastic material.
  • a layer of wax is applied to a metallic supporting structure (not shown) of the prosthesis to be produced, which is obtained in a known manner; the layer is sculpted manually in order to produce the shape of the teeth to be reconstructed.
  • the metallic structure, with the wax thus modeled, is then placed on the first plate-like element 1 after arranging a certain amount of silicone on the element 1, so that the apex of the wax teeth (not shown) lies below (by a few millimeters) the fourth plate-like element 7.
  • the metallic supporting structure rests on a silicone base which is arranged on the first plate-like element 1 at the blocks 5 removed beforehand from the plate-like element 4 superimposed on the element 1.
  • the blocks 5 are removed from the element 4 by acting through the small holes 2 formed in the base plate-like element 1, so as to remove the blocks corresponding to the portion to be reconstructed of the dental arch of the patient.
  • the plate-like element 6 When the supporting structure is placed on the base element 1, whereon the plate-like element 4 is superimposed, the plate-like element 6 is positioned, superimposing said blocks 5 on the blocks 5 of the plate-like element 4. At this point, silicone or other suitable transparent material is injected.
  • the transparent silicone deposits around the metallic structure, saturating the plate-like element 6 and filling the above mentioned undercuts.
  • the fourth plate-like element 7 is then positioned.
  • the four plate-like elements 1, 4, 6 and 7 are then mutually clamped by means of the traction elements 10, so that the transparent silicone adheres to the sculpted wax that covers the metallic supporting structure.
  • the excess transparent silicone flows out of the container 100 by means of the channels 9 formed in the third plate-like element 6 at the blocks 5.
  • the container 100 is opened, simultaneously removing the third and fourth plate-like elements 6 and 7; since said undercuts and the discharge channels are present, they act as retention elements for the transparent silicone, so that when opening the container 100 the silicone remains coupled to the third and fourth plate-like elements 6 and 7 and does not remain stuck to the wax teeth.
  • the transparent silicone has thus assumed the shape of the pattern previously made of wax.
  • the wax is then removed with hot water or steam and the conventional composite photopolymerizable material (opaque dentin) is applied between the metallic structure and the transparent silicone.
  • the container 100 is then closed again, by means of the traction elements 10, and in this manner the composite material occupies the space of the wax, i.e., the shape and the dimensions of the previously sculpted teeth.
  • the container 100 is then placed in a photopolymerizing machine, where the rays of light pass through the third and fourth transparent plate-like elements 6 and 7 and strike the metallic structure containing the composite material, which is photopolymerized and cures.
  • the resulting prosthesis is extracted from the container: first of all, a thin layer of opaque dentin is removed by means of diamondized mills and then the metallic structure, with the first composite thereon, is reinserted and an additional enamel composite is applied in the space left by the removed material. The container 100 is closed again and reinserted in the photopolymerizing machine. Once the polymerization of the second layer of composite has ended, the resulting prosthesis is extracted.
  • the shape, the number and the size of the blocks 5, as well as the shape, the number and the dimensions of the plate-like elements may differ from what has been shown in the different figures.
  • the number of plate-like elements need not be limited to the one described above.
  • the traction elements 10 are shown as having a square cross-section, but nothing forbids to change their cross-section.
  • the second and third plates may be made in a single piece as well as in a plurality of pieces. In practice the border regions of the second and third plates may be split in a plurality of pieces to facilitate the opening of the container.
  • the blocks 5, as before said, may be provided or not. Such blocks 5 allow the user to save filling material which must be poored in the mold. The fact of having the blocks 5 is thus purely an economical advantage.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dental Preparations (AREA)

Claims (14)

  1. Behälter für die Vernetzung von photopolymerisierbarem Verbundstoff auf Zahnbrücken, Zahnbögen und einzelnen Zähnen, umfassend mehrere plattenartige Elemente (1, 4, 6, 7), die gestapelt und zusammmengeklammert werden können, wobei zumindest eines der plattenartigen Elemente (6), welches innerhalb der mehreren plattenartigen Elemente liegt, einen Bereich in Form einer Aussparung aufweist, in den eine Tragkonstruktion eingesetzt werden kann, auf welcher die Elemente einer Zahnprothese ausgeformt sind,
    dadurch gekennzeichnet,
       daß zumindest eines (6) der plattenartigen Elemente (1, 4, 6, 7) und ein daran angrenzendes plattenartiges Element (7) des Behälters beide aus einem lichtdurchlässigen Material bestehen und daß die mehreren plattenartigen Elemente (1, 4, 6, 7) miteinander verbunden und mittels mehrerer, in den aufeinandergestapelten plattenartigen Elementen (1, 4, 6, 7) ausgeformte koaxiale Löcher (3) durchgreifender Zugelemente (10) zusammengeklammert sind.
  2. Behälter nach Anspruch 1, dadurch gekennzeichnet, daß die mehreren plattenartigen Elemente vier plattenartige Elemente (1, 4, 6, 7) umfassen, die übereinandergesetzt und aneinander geklammert werden können.
  3. Behälter nach Anspruch 1, dadurch gekennzeichnet, daß der Behälter ein erstes, eine Mehrzahl von Löchern (2) aufweisendes plattenartiges Element (1), ein zweites, darübergesetztes plattenartiges Element (4), welches in einem inneren Bereich aus einer Mehrzahl von unabhängig voneinander entfernbaren Blöcken (5) besteht, ein mit dem zweiten plattenartigen Element (4) identisches drittes plattenartiges Element (6) und ein viertes plattenartiges Element (7) umfaßt.
  4. Behälter nach Anspruch 3, dadurch gekennzeichnet, daß die Blöcke (5) des zweiten und dritten plattenartigen Elements (4, 6) an den in dem ersten plattenartigen Element (1) ausgeformten Löchern angeordnet sind.
  5. Behälter nach Anspruch 3, dadurch gekennzeichet, daß die Anzahl der Löcher (2) des ersten plattenartigen Elements (1) gleich der Anzahl der Blöcke (5) des zweiten und des dritten plattenartigen Elements (4, 6) ist.
  6. Behälter nach Anspruch 3, dadurch gekennzeichnet, daß die Blöcke (5) des zweiten und des dritten plattenartigen Elements (4, 6) zwischen einem Rand und einem mittleren Bereich der plattenartigen Elemente eingeschlossen sind.
  7. Behälter nach Anspruch 6, dadurch gekennzeichnet, daß in dem mittleren Bereich des dritten plattenartigen Elements (6) die an die Blöcke (5) angrenzenden Ränder seiner oberen Oberfläche abgeschrägt sind, wobei die abgeschrägten Bereiche Unterschneidungen ausformen wenn das dritte plattenartige Element (6) mit dem vierten plattenartigen Element verbunden ist.
  8. Behälter nach Anspruch 3, dadurch gekennzeichnet, daß an dem dritten plattenartigen Element (6) zu jedem der einen inneren Bereich des dritten plattenartigen Elements (6) ausbildenden Blöcke (5) Kanäle (9) ausgebildet sind, wobei die Kanäle (9) radial zum Rand des dritten plattenartigen Elements (6) gerichtet sind.
  9. Behälter nach Anspruch 1, dadurch gekennzeichent, daß die mehreren Zugelemente (10) ein Zugelement umfassen, welches die aufeinandergestapelten plattenartigen Elemente (1, 4, 6, 7) in einem mittleren Bereich (8) durchgreift und welches von dem Bereich in Form einer der Form eines ideellen Zahnbogens eines Patienten vergleichbaren Aussparung umgeben ist.
  10. Behälter nach Anspruch 3, dadurch gekennzeichnet, daß das dritte und das vierte plattenartige Element (4, 6) aus einem lichtdurchlässigen Material bestehen.
  11. Verfahren zur Vernetzung von Verbundmaterial auf Zahnkronen, Zahnbrücken und Zahnbögen mittels eines Behälters nach Anspruch 1,
    dadurch gekennzeichnet, daß es folgende Schritte umfaßt:
    Aufbringen von Wachs auf eine Metallstruktur zum Tragen eines Zahns, einer Brücke oder eines gesamten Zahnbogens und manuelles Modellieren des Wachs zur Rekonstruktion der Form des betreffenden Zahns;
    Einsetzen der Metallstruktur, auf die modelliertes Wachs aufgebracht wurde, in den Behälter;
    Einspritzen von transparentem Silikon in den Behälter, um die wachsbedeckte Metallstruktur zu umgeben, wobei die Struktur in das Silikon eingebettet wird,
    Aneinanderklammern der den Behälter bildenden plattenartigen Elemente (1, 4, 6, 7), um daß transparente Silikon zusammenzudrücken und an das bedeckende Wachs der Metallstruktur anhaften zu lassen, so daß das Silikon durch Aushärtung die Form des modellierten Wachs annimmt und die Gußform erhalten wird;
    Öffnen des Behälters, Entfernen des Wachs von der Metallstruktur und Füllen des durch die Entfernung des Wachs entstandenen Raums mit Verbundmaterial; und
    Wiedereinsetzen der Metallstruktur mit dem Verbundmaterial darauf in den Behälter und Belichten des Behälters mit in einer Photopolymerisationsmaschine zur Aushärtung des Verbundmaterials und zur Herstellung der beabsichtigten Prothese.
  12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß der aus dem Einsetzen der mit dem Wachs versehenen Metallstruktur in den Behälter bestehende Schritt folgenden Schritt umfaßt:
    Aufsetzen der Metallstruktur mit dem Wachs auf das erste plattenartige Element (1).
  13. Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß dem Schritt des Einspritzens von transparentem Silikon ein Schritt zur Positionierung des dritten plattenartigen Elements (6) vorausgeht.
  14. Verfahren nach Anspruch 13, dadurch gekennzeichnet, daß dem Schritt der Positionierung des dritten plattenartigen Elements (6) ein dem Schritt des Aneinanderklammerns vorausgehender Schritt zur Positionierung des vierten plattenartigen Elements (7) folgt.
EP98928221A 1997-05-29 1998-04-29 Behälter und verfahren zur vernetzung von verbundwerkstoffen auf zahnprothesen Expired - Lifetime EP0986345B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI971267 1997-05-29
IT97MI001267A IT1292036B1 (it) 1997-05-29 1997-05-29 Contenitore e procedimento per la reticolazione di materiali compositi su protesi dentarie,particolarmente per impiego con lampade
PCT/EP1998/002535 WO1998053756A1 (en) 1997-05-29 1998-04-29 Container and method for cross-linking composite materials on dental prosthesis

Publications (2)

Publication Number Publication Date
EP0986345A1 EP0986345A1 (de) 2000-03-22
EP0986345B1 true EP0986345B1 (de) 2001-07-18

Family

ID=11377249

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Application Number Title Priority Date Filing Date
EP98928221A Expired - Lifetime EP0986345B1 (de) 1997-05-29 1998-04-29 Behälter und verfahren zur vernetzung von verbundwerkstoffen auf zahnprothesen

Country Status (5)

Country Link
US (1) US6332991B1 (de)
EP (1) EP0986345B1 (de)
DE (1) DE69801159T2 (de)
IT (1) IT1292036B1 (de)
WO (1) WO1998053756A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT246945Y1 (it) * 1999-12-16 2002-04-10 Giuseppe Davide Scalavino Sistema muffola o stampo universale in materiale trasparente perrealizzarevponti, corone, arcate e protesi dentarie, in particolare
ITUD20010015A1 (it) * 2001-01-25 2002-07-25 Vincenzo Cuiuli Apparecchiatura e metodo per realizzare protesi dentarie
DE102004052393A1 (de) * 2004-10-28 2006-05-11 Robert Chan Zahnformelement und Basiselement
US8038920B2 (en) * 2006-01-25 2011-10-18 Carticept Medical, Inc. Methods of producing PVA hydrogel implants and related devices
DE102006026776A1 (de) * 2006-06-07 2007-12-13 Heraeus Kulzer Gmbh Verfahren zur Herstellung einer Zahnprothese
EP2008636A1 (de) * 2007-06-29 2008-12-31 3M Innovative Properties Company Dentale Zusammensetzung mit polyfunktionalem (Meth)Acrylat mit Urethan-, Harnstoff- oder Amidgruppen, Verfahren zu deren Herstellung und Verwendung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE513972A (de)
IT1017837B (it) 1974-08-02 1977-08-10 Pelizzari U Ontro stampo al silicone protesi denta li pronte per l usoprocedimento e relativa attrez zatura per ottenere da un
DE4005570A1 (de) * 1990-02-22 1991-08-29 Schuetz Dental Gmbh Verfahren zur herstellung eines dentalen gegenstandes
DE4028728A1 (de) 1990-09-10 1992-03-12 Wolfgang Dreve Verfahren zur herstellung einer kunststoff-zahnprothese

Also Published As

Publication number Publication date
EP0986345A1 (de) 2000-03-22
ITMI971267A1 (it) 1998-11-29
DE69801159D1 (de) 2001-08-23
US6332991B1 (en) 2001-12-25
WO1998053756A1 (en) 1998-12-03
IT1292036B1 (it) 1999-01-25
ITMI971267A0 (de) 1997-05-29
DE69801159T2 (de) 2002-03-14

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